From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Standardisation of ground gears in place of helical gears in the gearbox to improve silence.
| Identifier | ExFiles\Box 172\1\ img015 | |
| Date | 26th February 1923 | |
| R R 765 (S H) (S R 268. 19-9-21) G 2954 COMPLETED 6.3.23. STANDARDISATION of CHASSIS PARTS. Date 26.2.23. X No. 4543 Drawing No. Part List Description of Parts. Ground gears in place of helical for continuous gears in Gear Box. Origin. To improve silence. Experimental Test Report. We are having consistent success with the Ground Gears in 20 and 40/50 HP. Gearboxes. With the helical side shaft gears, these are run in with a cutting powder - with the ground side shaft gears we can avoid entirely the use of cutting powder on the gearbox. Road Test Report. Fitted to 3-G-11 " " 5-G-11. Both gear boxes are very good for silence. Run 7,000 miles. A Scrap and replace at all costs, including Chassis already delivered to customers. B Scrap and replace on Chassis in works. C Scrap present stock and replace on all Chassis not yet handed to test. D Use existing stock Alteration effective on future Chassis. Signature of Exp. Dept. that above is correct. E.{Mr Elliott - Chief Engineer} Hives. Weight of Old Part. Cost of Old Part. £ 3. 7. 9 Weight of New Part. Cost of New Part. £ 2. 10. 0. Difference per Car. £ 0. 17. 9 saving. Signature of Mr. De LOOZE that above is correct. MY/JW 28.2.23. SIGNATURES | DATE | REMARKS Mr. JOHNSON | 6.3.23 | Agreed. CJ. Mr. E.{Mr Elliott - Chief Engineer} Johnson | 6.3.23 | Agreed. BJ. Mr. ROYCE | 12.3.23 | Agreed. Try Sample as soon as possible Mr. WORMALD | 26.2.23 | Agreed. Wor.{Arthur Wormald - General Works Manager} MR. BARRINGTON (Mr. Rowledge) | 23.2.23 | Agreed. Ra. Mr. DAY | 23.2.23 | Agreed. Da.{Bernard Day - Chassis Design} Mr. BAILEY | 26.2.23 | Agreed. BY.{R.W. Bailey - Chief Engineer} Mr. PLATFORD | 26.2.23 | Agreed. EP.{G. Eric Platford - Chief Quality Engineer} Mr. NORTHEY | 27.2.23 | Agreed. PN.{Mr Northey} Cost of Parts in Works which will be scrapped if commenced on:- Series..........£.......... Series..........£.......... Series..........£.......... Storekeeper advised re above: Storekeeper's Signature. | ||